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TI-2025-11565 Aliases CVE-2025-12611GHSA-rfpm-frcg-62rg

Tenda AC21 SetPptpServerCfg formSetPPTPServer buffer overflow

Priority HIGH 73CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

A vulnerability was identified in Tenda AC21 16.03.08.16. This vulnerability affects the function formSetPPTPServer of the file /goform/SetPptpServerCfg. The manipulation of the argument startIp leads to buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00741 54th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TendaAC2116.03.08.16—No fix listedCNA
  • AC21 VendorTenda Affected 16.03.08.16 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tenda:ac21_firmware:16.03.08.16:*:*:*:*:*:*:*16.03.08.16VulnerableTenda
cpe:2.3:h:tenda:ac21:1.0:*:*:*:*:*:*:*1.0Running onTenda
  • cpe:2.3:o:tenda:ac21_firmware:16.03.08.16:*:*:*:*:*:*:* Versions 16.03.08.16 Vulnerable ·Tenda
  • cpe:2.3:h:tenda:ac21:1.0:*:*:*:*:*:*:* Versions 1.0 Running on ·Tenda

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-12611
  2. 2026-10-03 Alias added: GHSA-rfpm-frcg-62rg

References

Exploit 1

Other 1

  • TI-2025-08798 Tenda AC21/AC23 GetParentControlInfo stack-based overflow CVSS 4.0CRITICAL 9.3
  • TI-2026-01322 Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2025-12293 Tenda AC21 SetSysTimeCfg stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2025-12292 Tenda AC21 SetIpMacBind stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2025-10159 Tenda AC21 SetStaticRouteCfg sscanf buffer overflow CVSS 4.0HIGH 8.7
  • TI-2023-09979 A stack overflow vulnerability in Tenda AC21 with firmware version… CVSS 3.1HIGH 8.8
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences